Design and experiment of fertilizer distribution apparatus with double-level screws

Through establishing mathematical models of per lap fertilizer amounts for the fertilizing screw, the fertilizing principle of fertilizer distribution apparatus with double-level screws was studied, and related parameters were analyzed as well. Test results show that, 1) In 10-200 r/min speed range, for Batian compound fertilizer, rice specific fertilizer, and Batian compound fertilizer and rice specific fertilizer after the absorption of moisture, the fertilizer amount per minute of the fertilizer distribution apparatus with double-level screws increases with increased speed, showing a linear relationship with a correlation coefficient of larger than 0.998. 2) In 10-200 r/min speed range, the standard deviation, range and variation coefficient of the per lap fertilizer amounts are relatively small for 3 types of fertilizing screws. 3) In 10-200 r/min speed range, by comparing theoretical fertilizer amount per lap and theoretical filling rate with actual values, respectively, mathematical models of the per la